nixos: trust users in @wheel group
nixos: trust users in @wheel group

This is required for copying packages that were built from custom
expressions with nix-copy-closure. The snippet for that is

  closure=/nix/store/...foo \
    && nix-copy-closure --from l@k0 $closure \
    && nix-env -i $closure

where "l@k0" is my filled in value for <user>@<remote_host>.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg